build: Improve Docker dev setup, add nodemon config (#1145)

* Updated the base image in `Dockerfile.dev` from `node:18-alpine` to `node:lts-alpine` to use more or less the same as for production docker build (where the client is build lts and server is 18... so yeah not really...)
* Removed the `USER node` directive, to prevent permission issues as we hook the whole folder into the container.
* Modified the `docker-compose-dev.yml` file to enhance the database healthcheck. The new healthcheck ensures not only postgres is ready but also the database is ready by running a sample query (`SELECT 1`) and adjusts the interval, retries, and start period for better reliability.
* Added a `nodemon.json` configuration file to watch only relevant files (node_modules would be ignored but not files like the python venv) and avoid rapid successive restarts with the delay.

server/nodemon.json

@@ -0,0 +1,15 @@
+{
+  "watch": [
+    "api/**/*.js",
+    "config/**/*.js",
+    "db/**/*.js",
+    "utils/**/*.js",
+    "app.js",
+    "constants.js"
+  ],
+  "ignore": ["node_modules", ".tmp", ".venv"],
+  "ext": "js,json",
+  "verbose": true,
+  "delay": 1000,
+  "legacyWatch": false
+}