Set image tag as 18.04

On ubuntu:18.04 there is not a non-root "ubuntu" user

.github/workflows/main.yml

@@ -17,5 +17,5 @@ jobs:
     with:
       DOCKER_REPOSITORY_NAME: rubensa
       DOCKER_IMAGE_NAME: ubuntu-tini-user
-      DOCKER_IMAGE_TAG: latest
+      DOCKER_IMAGE_TAG: 18.04
     secrets: inherit

Dockerfile

@@ -1,4 +1,4 @@
-FROM rubensa/ubuntu-tini
+FROM rubensa/ubuntu-tini:18.04
 LABEL author="Ruben Suarez <[email protected]>"
 
 # Architecture component of TARGETPLATFORM (platform of the build result)
@@ -16,17 +16,6 @@ ARG GROUP_NAME=group
 ENV USER_NAME=${USER_NAME}
 ENV GROUP_NAME=${GROUP_NAME}
 
-# Since ubuntu:23.04 a non-root "ubuntu" user is created by default with UID=1000
-# Let's remove it to avoid conflicts
-RUN echo "# Removing default 'ubuntu' user..." \
-  #
-  # avoid "userdel: ubuntu mail spool (/var/mail/ubuntu) not found" warning
-  && touch /var/mail/ubuntu \
-  && chown ubuntu /var/mail/ubuntu \
-  #
-  # remove user
-  && userdel -r ubuntu
-
 # Create a non-root user with custom group
 RUN echo "# Creating group '${GROUP_NAME}' (${GROUP_ID})..." \
   && groupadd --gid ${GROUP_ID} ${GROUP_NAME} \

README.md

@@ -1,4 +1,4 @@
-# Docker image based on rubensa/ubuntu-tini with non root user support
+# Docker image based on rubensa/ubuntu-tini 18.04 with non root user support
 
 This is a Docker image based on [rubensa/ubuntu-tini](https://github.com/rubensa/docker-ubuntu-tini) that allows you to connect and run with a non-root user created inside the image.
 
@@ -13,7 +13,7 @@ You can build the image like this:
 
 DOCKER_REPOSITORY_NAME="rubensa"
 DOCKER_IMAGE_NAME="ubuntu-tini-user"
-DOCKER_IMAGE_TAG="latest"
+DOCKER_IMAGE_TAG="18.04"
 
 docker buildx build --platform=linux/amd64,linux/arm64 --no-cache \
   -t "${DOCKER_REPOSITORY_NAME}/${DOCKER_IMAGE_NAME}:${DOCKER_IMAGE_TAG}" \
@@ -32,7 +32,7 @@ You can also add build image args to change default non-root user (user:1000) an
 
 DOCKER_REPOSITORY_NAME="rubensa"
 DOCKER_IMAGE_NAME="ubuntu-tini-user"
-DOCKER_IMAGE_TAG="latest"
+DOCKER_IMAGE_TAG="18.04"
 
 # Get current user UID
 USER_ID=$(id -u)
@@ -76,7 +76,7 @@ You can run the container like this (change --rm with -d if you don't want the c
 
 DOCKER_REPOSITORY_NAME="rubensa"
 DOCKER_IMAGE_NAME="ubuntu-tini-user"
-DOCKER_IMAGE_TAG="latest"
+DOCKER_IMAGE_TAG="18.04"
 
 # Get current user UID
 USER_ID=$(id -u)

build-custom.sh

@@ -2,7 +2,7 @@
 
 DOCKER_REPOSITORY_NAME="rubensa"
 DOCKER_IMAGE_NAME="ubuntu-tini-user"
-DOCKER_IMAGE_TAG="latest"
+DOCKER_IMAGE_TAG="18.04"
 
 # Get current user UID
 USER_ID=$(id -u)

build.sh

@@ -2,7 +2,7 @@
 
 DOCKER_REPOSITORY_NAME="rubensa"
 DOCKER_IMAGE_NAME="ubuntu-tini-user"
-DOCKER_IMAGE_TAG="latest"
+DOCKER_IMAGE_TAG="18.04"
 
 # see: https://github.com/docker/buildx/issues/495#issuecomment-761562905
 #docker buildx build --platform=linux/amd64,linux/arm64 --no-cache --progress=plain --pull \

run.sh

@@ -2,7 +2,7 @@
 
 DOCKER_REPOSITORY_NAME="rubensa"
 DOCKER_IMAGE_NAME="ubuntu-tini-user"
-DOCKER_IMAGE_TAG="latest"
+DOCKER_IMAGE_TAG="18.04"
 
 # Get current user UID
 USER_ID=$(id -u)