renaming Orbit tests task to ci: it now runs all linter + tests + build the gotenberg binary

_ci/docker-entrypoint.sh

@@ -21,5 +21,8 @@ else
     done
 fi
 
+# Builds the Linux binary.
+env GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags "-X main.version=${VERSION}" && mv gotenberg _build/;
+
 # Bye!
 exit 0;