Add GDPR_EMAIL environment variable for Docker deployments (#743)

* Initial plan

* Add GDPR_EMAIL environment variable for Docker deployments

Co-authored-by: sstidl <12804296+sstidl@users.noreply.github.com>

* Improve GDPR_EMAIL handling with proper escaping and loop

Co-authored-by: sstidl <12804296+sstidl@users.noreply.github.com>

* Refine GDPR_EMAIL processing - skip index.html and improve escaping

Co-authored-by: sstidl <12804296+sstidl@users.noreply.github.com>

* Optimize GDPR_EMAIL sed commands and improve escaping

Co-authored-by: sstidl <12804296+sstidl@users.noreply.github.com>

* Clarify sed escaping comment for GDPR_EMAIL

Co-authored-by: sstidl <12804296+sstidl@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: sstidl <12804296+sstidl@users.noreply.github.com>

doc_docker.md

@@ -38,6 +38,7 @@ services:
       #REDACT_IP_ADDRESSES: "false"
       #PASSWORD:
       #EMAIL:
+      #GDPR_EMAIL: "privacy@example.com"
       #DISABLE_IPINFO: "false"
       #IPINFO_APIKEY: "your api key"
       #DISTANCE: "km"
@@ -72,6 +73,7 @@ Here's a list of additional environment variables available in this mode:
   * mssql - not supported in docker image yet (feel free to open a PR with that, has to be done in `entrypoint.sh`)
 * __`PASSWORD`__: Password to access the stats page. If not set, stats page will not allow accesses.
 * __`EMAIL`__: Email address for GDPR requests. Must be specified when telemetry is enabled.
+* __`GDPR_EMAIL`__: Email address displayed in the privacy policy for data deletion requests. If not set, the default placeholder text will be shown. This should be set to comply with GDPR requirements when running in production.
 * __`DISABLE_IPINFO`__: If set to `true`, ISP info and distance will not be fetched from either [ipinfo.io](https://ipinfo.io) or the offline database. Default: value: `false`
 * __`IPINFO_APIKEY`__: API key for [ipinfo.io](https://ipinfo.io). Optional, but required if you want to use the full [ipinfo.io](https://ipinfo.io) APIs (required for distance measurement)
 * __`DISTANCE`__: When `DISABLE_IPINFO` is set to false, this specifies how the distance from the server is measured. Can be either `km` for kilometers, `mi` for miles, or an empty string to disable distance measurement. Requires an [ipinfo.io](https://ipinfo.io) API key. Default value: `km`

docker/entrypoint.sh

@@ -7,6 +7,7 @@ echo "WEBPORT: $WEBPORT"
 echo "REDACT_IP_ADDRESSES: $REDACT_IP_ADDRESSES"
 echo "DB_TYPE: $DB_TYPE"
 echo "ENABLE_ID_OBFUSCATION: $ENABLE_ID_OBFUSCATION"
+echo "GDPR_EMAIL: $GDPR_EMAIL"
 
 set -e
 #set -x
@@ -73,6 +74,18 @@ if [[ "$MODE" == "frontend" || "$MODE" == "dual" ||  "$MODE" == "standalone" ]];
     # generate config for just the local server
     echo '[{"name":"local","server":"/backend",  "dlURL": "garbage.php", "ulURL": "empty.php", "pingURL": "empty.php", "getIpURL": "getIP.php", "sponsorName": "", "sponsorURL": "", "id":1 }]' > /var/www/html/server-list.json
   fi
+  
+  # Replace GDPR email placeholder if GDPR_EMAIL is set
+  if [ ! -z "$GDPR_EMAIL" ]; then
+    # Escape special sed characters: & (replacement), / (delimiter), \ (escape), $ (variable)
+    GDPR_EMAIL_ESCAPED=$(printf '%s\n' "$GDPR_EMAIL" | sed 's/[&/\\]/\\&/g; s/\$/\\$/g')
+    
+    for html_file in /var/www/html/index-modern.html /var/www/html/index-classic.html; do
+      if [ -f "$html_file" ]; then
+        sed -i "s/TO BE FILLED BY DEVELOPER/$GDPR_EMAIL_ESCAPED/g; s/PUT@YOUR_EMAIL.HERE/$GDPR_EMAIL_ESCAPED/g" "$html_file"
+      fi
+    done
+  fi
 fi
 # Configure design preference via config.json
 if [ "$USE_NEW_DESIGN" == "true" ]; then