Add services and work on styling

frontend/.devcontainer/Dockerfile

@@ -1,6 +1,7 @@
 ARG VARIANT=24-bookworm
 FROM mcr.microsoft.com/devcontainers/typescript-node:5-${VARIANT}
 
+ARG NPM_VERSION=11.19.0
 ARG ANGULAR_CLI_VERSION=21
 
 USER root
@@ -9,7 +10,10 @@ RUN npm install \
         --global \
         --no-audit \
         --no-fund \
+        "npm@${NPM_VERSION}" \
         "@angular/cli@${ANGULAR_CLI_VERSION}" \
+    && npm --version \
+    && ng version \
     && npm cache clean --force
 
 USER node