Backend startup quickstart:

----------------------------->  BEST
## 1. brew services start postgresql@15

          OR 

      /opt/homebrew/opt/postgresql@15/bin/pg_ctl -D /opt/homebrew/var/postgresql@15 start

## 2.   ALLIN ONE: 
        Make dev-all — Runs both the API and poller concurrently.
----------------------------->  BEST

          - OR - 
          
           
## 3.  Option 1: Single command (both API + poller)
       cd /Users/kjannette/workspace/koin_ping_0.2.0/backendmake dev-all

## 4.   Option 2: Two separate terminals
        Terminal 1 (API server):
        cd /Users/kjannette/workspace/koin_ping_0.2.0/backend go run ./cmd/api
        
        make run — Builds and runs the API server.
        make dev — Runs the API server with auto-reload via air (falls back to go run if air isn't installed).

## 5.   Terminal 2 (Poller):
        cd /Users/kjannette/workspace/koin_ping_0.2.0/backend 
        go run ./cmd/poller

        make poller — Builds and runs the poller.
        make poller-dev — Runs the poller with auto-reload.

## Production: `make build` + restart service

On the server, from this directory:

- **`make build`** — writes fresh **`bin/api`** and **`bin/poller`** (see the Makefile).
- **`make build-api`** — API only; **`make build-poller`** — poller only.

Building alone does **not** reload a process that is already listening (e.g. on port 8080). After deploy:

1. Ensure **`systemctl`** (or your supervisor) **`ExecStart`** runs the binary you just built (e.g. **`.../backend/bin/api`**) or copy `bin/api` to that path.
2. **`sudo systemctl restart <your-api-service>`** (and the poller service if you rebuilt it).
3. Optional check: **`readlink -f /proc/<pid>/exe`** should show your **`bin/api`** path without **`(deleted)`** — if you see `(deleted)`, an old process is still running the previous binary from memory.