Refactor environment variable handling in Dockerfile and entrypoint.sh for consistency and clarity

entrypoint.sh

@@ -14,15 +14,15 @@ if [ ! -f "$CONFIG_FILE" ]; then
   cat > "$CONFIG_FILE" <<EOF
 {
   "host": "${HB_HOST}",
-  "port": ${PORT},
-  "naturalCritURL": "${HB_NATURALCRIT_URL}",
+  "web_port": ${PORT},
+  "naturalcrit_url": "${HB_NATURALCRIT_URL}",
   "secret": "${HB_SECRET}",
-  "enableV3": ${HB_ENABLE_V3:-false},
-  "enableThemes": ${HB_ENABLE_THEMES:-false},
-  "localEnvironments": "${HB_LOCAL_ENVIRONMENTS}",
+  "enable_v3": ${HB_ENABLE_V3:-true},
+  "enable_themes": ${HB_ENABLE_THEMES:-true},
   "publicUrl": "${HB_PUBLIC_URL}",
-  "images": ${HB_IMAGES:-null},
-  "fonts": ${HB_FONTS:-null}
+  "mongodb_uri": "${HB_DB_URI}",
+  "hb_images": ${HB_IMAGES:-null},
+  "hb_fonts": ${HB_FONTS:-null}
 }
 EOF