l3d#34 Add support for PHP 7.3

.gitlab-ci.yml

@@ -24,3 +24,11 @@ php-7.2:
     - docker push $CI_REGISTRY_IMAGE:php-7.2
   only:
     - master
+
+php-7.3:
+  stage: build
+  script:
+    - docker build --pull --build-arg ALPINE_VERSION=3.11 --build-arg PHP_VERSION=7.3 -t $CI_REGISTRY_IMAGE:php-7.3 .
+    - docker push $CI_REGISTRY_IMAGE:php-7.3
+  only:
+    - master

Dockerfile

-FROM alpine:3.8
+ARG ALPINE_VERSION
+
+FROM alpine:${ALPINE_VERSION}
 
 LABEL com.example.vendor="LakeDrops" \
       maintainer="juergen.haas@lakedrops.com" \
@@ -87,6 +89,9 @@ RUN echo 'hosts: files dns' > /etc/nsswitch.conf && \
     if [ "${PHP_VERSION}" = "7.2" ]; then \
       apk add --no-cache php7-sodium ; \
     fi && \
+    if [ "${PHP_VERSION}" = "7.3" ]; then \
+      apk add --no-cache php7-sodium ; \
+    fi && \
     rm /etc/apk/repositories && \
     mv /etc/apk/repositories.org /etc/apk/repositories && \
     apk update && \