Convert backends to Firebase and combine projects

.gitignore

@@ -0,0 +1,27 @@
+# Dependency directories
+**/node_modules/
+**/target/
+
+# Build outputs
+**/dist/
+**/.tmp/
+
+# System files
+.DS_Store
+Thumbs.db
+
+# Credentials & environment files
+**/firebasecred
+**/.env
+**/.env.local
+**/.env.*.local
+
+# IDE files
+**/.vscode/
+**/.idea/
+**/*.iml
+**/*.suo
+**/*.ntvs*
+**/*.njsproj
+**/*.sln
+**/*.sw?