diff --git a/README-RASPBERRYPI.md b/README-RASPBERRYPI.md
index e623985..9e5f2c2 100644
--- a/README-RASPBERRYPI.md
+++ b/README-RASPBERRYPI.md
@@ -4,16 +4,21 @@ This readme only contains a detailed explanation of how to set up the WireGuard
 
 ## Setup
 
-You can download prebuild binaries from the [release page](https://github.com/h44z/wg-portal/releases). If you want to build the binary yourself,
-use the following instructions:
+You can either download prebuild binaries from the [release page](https://github.com/h44z/wg-portal/releases) or use Docker images for ARM. 
+If you want to build the binary yourself, use the following building instructions.
 
 ### Building
 This section describes how to build the WireGuard Portal code.
 To compile the final binary, use the Makefile provided in the repository.
 As WireGuard Portal is written in Go, **golang >= 1.16** must be installed prior to building.
+If you want to cross compile ARM binaries from AMD64 systems, install *arm-linux-gnueabi-gcc* (armv7) or *aarch64-linux-gnu-gcc* (arm64).
 
 ```
-make build-cross-plat
+# for 64 bit OS
+make build-arm64
+
+# for 32 bit OS
+make build-arm 
 ```
 
 The compiled binary and all necessary assets will be located in the dist folder.
diff --git a/README.md b/README.md
index 0f354ff..704dddf 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@ services:
 ```
 Please note that mapping ```/etc/wireguard``` to ```/etc/wireguard``` inside the docker, will erase your host's current configuration.
 If needed, please make sure to back up your files from ```/etc/wireguard```.
-For a full list of configuration options take a look at the source file [internal/server/configuration.go](internal/server/configuration.go#L56).
+For a full list of configuration options take a look at the source file [internal/server/configuration.go](internal/server/configuration.go#L58).
 
 ### Standalone
 For a standalone application, use the Makefile provided in the repository to build the application. Go version 1.16 or higher has to be installed to build WireGuard Portal.
diff --git a/cmd/wg-portal/main.go b/cmd/wg-portal/main.go
index 0535728..14b5841 100644
--- a/cmd/wg-portal/main.go
+++ b/cmd/wg-portal/main.go
@@ -2,7 +2,7 @@ package main
 
 import (
 	"context"
-	"io/ioutil"
+	"io"
 	"os"
 	"os/signal"
 	"runtime"
@@ -74,7 +74,7 @@ func setupLogger(logger *logrus.Logger) error {
 
 	switch level {
 	case "off":
-		logger.SetOutput(ioutil.Discard)
+		logger.SetOutput(io.Discard)
 	case "info":
 		logger.SetLevel(logrus.InfoLevel)
 	case "debug":
diff --git a/internal/authentication/providers/ldap/provider.go b/internal/authentication/providers/ldap/provider.go
index dff2575..88a588d 100644
--- a/internal/authentication/providers/ldap/provider.go
+++ b/internal/authentication/providers/ldap/provider.go
@@ -2,7 +2,7 @@ package ldap
 
 import (
 	"crypto/tls"
-	"io/ioutil"
+	"os"
 	"strings"
 
 	"github.com/gin-gonic/gin"
@@ -48,8 +48,8 @@ func (Provider) GetPriority() int {
 	return 1 // LDAP password provider
 }
 
-func (provider Provider) SetupRoutes(routes *gin.RouterGroup) {
-	// nothing todo here
+func (provider Provider) SetupRoutes(_ *gin.RouterGroup) {
+	// nothing here
 }
 
 func (provider Provider) Login(ctx *authentication.AuthContext) (string, error) {
@@ -97,8 +97,8 @@ func (provider Provider) Login(ctx *authentication.AuthContext) (string, error)
 	return sr.Entries[0].GetAttributeValue(provider.config.EmailAttribute), nil
 }
 
-func (provider Provider) Logout(context *authentication.AuthContext) error {
-	return nil // nothing todo here
+func (provider Provider) Logout(_ *authentication.AuthContext) error {
+	return nil // nothing here
 }
 
 func (provider Provider) GetUserModel(ctx *authentication.AuthContext) (*authentication.User, error) {
@@ -159,23 +159,23 @@ func (provider Provider) open() (*ldap.Conn, error) {
 
 	if provider.config.LdapCertConn {
 
-		cert_plain, err := ioutil.ReadFile(provider.config.LdapTlsCert)
+		certPlain, err := os.ReadFile(provider.config.LdapTlsCert)
 		if err != nil {
 			return nil, errors.WithMessage(err, "failed to load the certificate")
 
 		}
 
-		key, err := ioutil.ReadFile(provider.config.LdapTlsKey)
+		key, err := os.ReadFile(provider.config.LdapTlsKey)
 		if err != nil {
 			return nil, errors.WithMessage(err, "failed to load the key")
 		}
 
-		cert_x509, err := tls.X509KeyPair(cert_plain, key)
+		certX509, err := tls.X509KeyPair(certPlain, key)
 		if err != nil {
 			return nil, errors.WithMessage(err, "failed X509")
 
 		}
-		tlsConfig = &tls.Config{Certificates: []tls.Certificate{cert_x509}}
+		tlsConfig = &tls.Config{Certificates: []tls.Certificate{certX509}}
 
 	} else {
 
diff --git a/internal/authentication/providers/password/provider.go b/internal/authentication/providers/password/provider.go
index e185ac1..7b28c18 100644
--- a/internal/authentication/providers/password/provider.go
+++ b/internal/authentication/providers/password/provider.go
@@ -50,8 +50,8 @@ func (Provider) GetPriority() int {
 	return 0 // DB password provider = highest prio
 }
 
-func (provider Provider) SetupRoutes(routes *gin.RouterGroup) {
-	// nothing todo here
+func (provider Provider) SetupRoutes(_ *gin.RouterGroup) {
+	// nothing here
 }
 
 func (provider Provider) Login(ctx *authentication.AuthContext) (string, error) {
@@ -79,8 +79,8 @@ func (provider Provider) Login(ctx *authentication.AuthContext) (string, error)
 	return user.Email, nil
 }
 
-func (provider Provider) Logout(context *authentication.AuthContext) error {
-	return nil // nothing todo here
+func (provider Provider) Logout(_ *authentication.AuthContext) error {
+	return nil // nothing here
 }
 
 func (provider Provider) GetUserModel(ctx *authentication.AuthContext) (*authentication.User, error) {
diff --git a/internal/common/email.go b/internal/common/email.go
index c72f667..acd449b 100644
--- a/internal/common/email.go
+++ b/internal/common/email.go
@@ -3,7 +3,6 @@ package common
 import (
 	"crypto/tls"
 	"io"
-	"io/ioutil"
 	"time"
 
 	"github.com/pkg/errors"
@@ -96,7 +95,7 @@ func SendEmailWithAttachments(cfg MailConfig, sender, replyTo, subject, body, ht
 	email.AddAlternative(mail.TextPlain, body)
 
 	for _, attachment := range attachments {
-		attachmentData, err := ioutil.ReadAll(attachment.Data)
+		attachmentData, err := io.ReadAll(attachment.Data)
 		if err != nil {
 			return errors.Wrapf(err, "failed to read attachment data for %s", attachment.Name)
 		}
diff --git a/internal/ldap/ldap.go b/internal/ldap/ldap.go
index d1d2c84..feec115 100644
--- a/internal/ldap/ldap.go
+++ b/internal/ldap/ldap.go
@@ -2,7 +2,7 @@ package ldap
 
 import (
 	"crypto/tls"
-	"io/ioutil"
+	"os"
 
 	"github.com/go-ldap/ldap/v3"
 	"github.com/pkg/errors"
@@ -19,23 +19,23 @@ func Open(cfg *Config) (*ldap.Conn, error) {
 
 	if cfg.LdapCertConn {
 
-		cert_plain, err := ioutil.ReadFile(cfg.LdapTlsCert)
+		certPlain, err := os.ReadFile(cfg.LdapTlsCert)
 		if err != nil {
 			return nil, errors.WithMessage(err, "failed to load the certificate")
 
 		}
 
-		key, err := ioutil.ReadFile(cfg.LdapTlsKey)
+		key, err := os.ReadFile(cfg.LdapTlsKey)
 		if err != nil {
 			return nil, errors.WithMessage(err, "failed to load the key")
 		}
 
-		cert_x509, err := tls.X509KeyPair(cert_plain, key)
+		certX509, err := tls.X509KeyPair(certPlain, key)
 		if err != nil {
 			return nil, errors.WithMessage(err, "failed X509")
 
 		}
-		tlsConfig = &tls.Config{Certificates: []tls.Certificate{cert_x509}}
+		tlsConfig = &tls.Config{Certificates: []tls.Certificate{certX509}}
 
 	} else {
 
diff --git a/internal/server/server.go b/internal/server/server.go
index 06cfeaa..5ccce9c 100644
--- a/internal/server/server.go
+++ b/internal/server/server.go
@@ -4,8 +4,8 @@ import (
 	"context"
 	"encoding/gob"
 	"html/template"
+	"io"
 	"io/fs"
-	"io/ioutil"
 	"math/rand"
 	"net/http"
 	"net/url"
@@ -110,7 +110,7 @@ func (s *Server) Setup(ctx context.Context) error {
 
 	// Setup http server
 	gin.SetMode(gin.DebugMode)
-	gin.DefaultWriter = ioutil.Discard
+	gin.DefaultWriter = io.Discard
 	s.server = gin.New()
 	if logrus.GetLevel() == logrus.TraceLevel {
 		s.server.Use(ginlogrus.Logger(logrus.StandardLogger()))
diff --git a/internal/server/server_helper.go b/internal/server/server_helper.go
index 6b75417..da00937 100644
--- a/internal/server/server_helper.go
+++ b/internal/server/server_helper.go
@@ -4,7 +4,7 @@ import (
 	"context"
 	"crypto/md5"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path"
 	"syscall"
 	"time"
@@ -224,7 +224,7 @@ func (s *Server) WriteWireGuardConfigFile(device string) error {
 		return errors.WithMessage(err, "failed to get config file")
 	}
 	filePath := path.Join(s.config.WG.ConfigDirectoryPath, dev.DeviceName+".conf")
-	if err := ioutil.WriteFile(filePath, cfg, 0644); err != nil {
+	if err := os.WriteFile(filePath, cfg, 0644); err != nil {
 		return errors.Wrap(err, "failed to write WireGuard config file")
 	}
 	return nil
diff --git a/internal/users/user.go b/internal/users/user.go
index 2a94fcf..7ae44df 100644
--- a/internal/users/user.go
+++ b/internal/users/user.go
@@ -11,7 +11,6 @@ type UserSource string
 const (
 	UserSourceLdap     UserSource = "ldap" // LDAP / ActiveDirectory
 	UserSourceDatabase UserSource = "db"   // sqlite / mysql database
-	UserSourceOIDC     UserSource = "oidc" // open id connect, TODO: implement
 )
 
 type PrivateString string