Use correct image for CI

https://github.com/koalaman/shellcheck/issues/1069

.gitlab-ci.yml

@@ -10,7 +10,7 @@ before_script:
 # TESTS
 #
 
-lint_dockerfile:
+lint-dockerfile:
   stage: test
   image: hadolint/hadolint:latest-debian
   before_script:
@@ -19,6 +19,14 @@ lint_dockerfile:
   script:
     - find . -name "Dockerfile" -execdir hadolint {} \;
 
+lint-shell-script:
+  stage: test
+  image: koalaman/shellcheck-alpine:latest
+  before_script:
+    - shellcheck -V
+  script:
+    - find . -name "*.sh" -exec shellcheck {} \;
+
 #
 # IMAGE BUILDS/PUSHES
 #
@@ -41,6 +49,24 @@ build-golang-dev:
   except:
     - master
 
+# Debian Jessie builds
+build-debian-jessie-build-master:
+  stage: deploy
+  script:
+    - docker build --pull -t "$CI_REGISTRY_IMAGE/debian:jessie" ./debian/jessie
+    - docker push "$CI_REGISTRY_IMAGE/debian:jessie"
+  only:
+    - master
+  when: manual
+
+build-debian-jessie-build-dev:
+  stage: deploy
+  script:
+    - docker build --pull -t "$CI_REGISTRY_IMAGE/debian:jessie-dev" ./debian/jessie
+    - docker push "$CI_REGISTRY_IMAGE/debian:jessie-dev"
+  except:
+    - master
+
 # PHP 7.3
 build-php-7.3-master:
   stage: deploy

debian/jessie/Dockerfile

+FROM debian:jessie
+
+LABEL maintainer="ethitter"
+LABEL version="1.0"
+
+RUN echo "deb http://security.debian.org/ jessie/updates main" >> /etc/apt/sources.list
+
+RUN apt-get update \
+    && apt-get -yqqf --no-install-recommends install \
+        apt-transport-https \
+        lsb-release \
+        ca-certificates \
+        curl \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN curl -ssL -o /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
+RUN echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list
+
+RUN apt-get update \
+    && apt-get -y --no-install-recommends install \
+        git \
+        dh-make \
+        build-essential \
+        autoconf \
+        autotools-dev \
+        libpcre3 \
+        libpcre3-dev \
+        libz-dev \
+        gnupg \
+        libssl-dev \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*