Change docker image

.travis.yml

@@ -11,5 +11,5 @@ script:
   - mntdir='/mnt/ocs-manager'
   #- docker run --rm -v $(pwd):${mntdir} ubuntu:16.04 /bin/bash -c "sh ${mntdir}/scripts/build-docker.sh snap"
   #- docker run --rm -v $(pwd):${mntdir} ubuntu:16.04 /bin/bash -c "sh ${mntdir}/scripts/build-docker.sh flatpak"
-  - docker run --rm -v $(pwd):${mntdir} ubuntu:17.10 /bin/bash -c "sh ${mntdir}/scripts/build-docker.sh appimage"
+  - docker run --rm -v $(pwd):${mntdir} ubuntu:16.04 /bin/bash -c "sh ${mntdir}/scripts/build-docker.sh appimage"
   - cat transfer.log

scripts/build-docker.sh

@@ -34,7 +34,7 @@ build_flatpak() {
 }
 
 build_appimage() {
-    # docker-image: ubuntu:17.10
+    # docker-image: ubuntu:16.04
     apt update -qq
     apt -y install curl git