fix(docker-build): start main process with exec (#1210)

* Use exec

* Appl shellcheck fixes

* Close with newline

machine-learning/entrypoint.sh

@@ -1,3 +1,4 @@
+#! /bin/sh
 # npm run typeorm migration:run
 # npm run start:prod
-node dist/main.js
+exec node dist/main.js

server/start-microservices.sh

@@ -1 +1,2 @@
-node dist/apps/microservices/apps/microservices/src/main
+#! /bin/sh
+exec node dist/apps/microservices/apps/microservices/src/main

server/start-server.sh

@@ -1 +1,2 @@
-node dist/apps/immich/apps/immich/src/main
+#! /bin/sh
+exec node dist/apps/immich/apps/immich/src/main

web/entrypoint.sh

@@ -1,5 +1,6 @@
-if [ `id -u` -eq 0 ] && [ -n "$PUID" ] && [ -n "$PGID" ]; then
-    exec setpriv --reuid $PUID --regid $PGID --clear-groups node /usr/src/app/build/index.js
+#! /bin/sh
+if [ "$(id -u)" -eq 0 ] && [ -n "$PUID" ] && [ -n "$PGID" ]; then
+    exec setpriv --reuid "$PUID" --regid "$PGID" --clear-groups node /usr/src/app/build/index.js
 else
-    node /usr/src/app/build/index.js
-fi
+    exec node /usr/src/app/build/index.js
+fi