refactor: séparer executable et library

Dockerfile

@@ -4,15 +4,16 @@ LABEL author="vlbeaudoin"
 
 WORKDIR /go/src/app
 
-COPY LICENSE cmd.go config.go db.go entity.go flag.go go.mod go.sum handler.go main.go server.go ./
+COPY LICENSE cmd.go config.go db.go entity.go flag.go go.mod go.sum handler.go server.go ./
 
+ADD cmd/ cmd/
 ADD queries/ queries/
 ADD ui/ ui/
 
 RUN CGO_ENABLED=0 go build \
     -a \
     -o presences \
-    ./
+    ./cmd/presences/
 
 # Alpine