remove DOCKER_API_VERSION from dockerfile, fixes #172.

Dockerfile

@@ -31,7 +31,6 @@ FROM scratch
 COPY --from=builder /app/bin/neko_rooms /app/bin/neko_rooms
 COPY --from=frontend /src/dist/ /var/www
 
-ENV DOCKER_API_VERSION=1.39
 ENV NEKO_ROOMS_BIND=:8080
 ENV NEKO_ROOMS_ADMIN_STATIC=/var/www
 

dev/start

@@ -58,7 +58,6 @@ docker run --rm -it \
 	-e "NEKO_ROOMS_MOUNTS_WHITELIST=`realpath ${EXTERNAL_PATH}`" \
 	-e "NEKO_ROOMS_PATH_PREFIX=/room/" \
 	-e "NEKO_ROOMS_TRAEFIK_ENABLED=false" \
-    -e 'DOCKER_API_VERSION=1.39' \
     -v "/var/run/docker.sock:/var/run/docker.sock" \
     --net="${NEKO_ROOMS_INSTANCE_NETWORK}" \
     --entrypoint="/app/bin/neko_rooms" \

dev/traefik/start

@@ -31,7 +31,6 @@ docker run --rm -it \
 	-e "NEKO_ROOMS_TRAEFIK_DOMAIN=${NEKO_ROOMS_TRAEFIK_DOMAIN}" \
 	-e "NEKO_ROOMS_TRAEFIK_ENTRYPOINT=${NEKO_ROOMS_TRAEFIK_ENTRYPOINT}" \
 	-e "NEKO_ROOMS_TRAEFIK_NETWORK=${NEKO_ROOMS_TRAEFIK_NETWORK}" \
-    -e 'DOCKER_API_VERSION=1.39' \
     -v "/var/run/docker.sock:/var/run/docker.sock" \
     --net="${NEKO_ROOMS_TRAEFIK_NETWORK}" \
     -l "traefik.enable=true" \

neko.go

@@ -124,7 +124,9 @@ func (main *MainCtx) Start() {
 	if err != nil {
 		main.logger.Panic().Err(err).Msg("unable to connect to docker client")
 	} else {
-		main.logger.Info().Msg("successfully connected to docker client")
+		main.logger.Info().
+			Str("version", client.ClientVersion()).
+			Msg("successfully connected to docker client")
 	}
 
 	main.roomManager = room.New(