Remove Alpine instructions from Docker install doc

Signed-off-by: Diana <[email protected]>

app/_src/gateway/install/docker/build-custom-images.md

@@ -5,7 +5,7 @@ content_type: how-to
 
 Kong is distributed as prebuilt `apk`, `deb`, and `rpm` packages, in addition to official Docker images hosted on [DockerHub](https://hub.docker.com/r/kong)
 
-Kong builds and verifies [Debian](#dockerhub-debian-link-here) and [RHEL](#dockerhub-rhel-link-here) images for use in production. [Alpine](#dockerhub-alpine-link-here) images are provided for **development purposes only** as they contain development tooling such as `git` for plugin development purposes.
+Kong builds and verifies [Debian](#dockerhub-debian-link-here) and [RHEL](#dockerhub-rhel-link-here) images for use in production. {% if_version lte:3.3.x %}[Alpine](#dockerhub-alpine-link-here) images are provided for **development purposes only** as they contain development tooling such as `git` for plugin development purposes.{% endif_version %}
 
 Our Debian and RHEL images are built with minimal dependencies (as of {{ site.base_gateway }} 3.0) and run through automated security scanners before being published. Any vulnerabilities detected in supported images will be addressed in the next available patch release.
 
@@ -25,13 +25,14 @@ chmod +x docker-entrypoint.sh
     {% if_version eq:3.0.x %}
     * **Alpine**: [.apk]({{ site.links.cloudsmith }}/public/gateway-{{ page.major_minor_version }}/raw/names/kong-enterprise-edition-x86_64/versions/{{page.versions.ee}}/kong-enterprise-edition-{{page.versions.ee}}.x86_64.apk.tar.gz)
     {% endif_version %}
-    {% if_version lt:3.0.x gte:3.1.x %}
+    {% if_version lte:3.3.x %}
     * **Alpine**: [.apk]({{ site.links.cloudsmith }}/public/gateway-{{ page.major_minor_version }}/alpine/any-version/main/x86_64/kong-enterprise-edition-{{page.versions.ee}}.apk)
     {% endif_version %}
     * **RHEL**:[ .rpm]({{ site.links.cloudsmith }}/public/gateway-{{ page.major_minor_version }}/rpm/el/8/x86_64/kong-enterprise-edition-{{page.versions.ee}}.el8.x86_64.rpm)
 
 1. Create a `Dockerfile`, ensuring you replace the filename by the first `COPY` with the name of the {{site.base_gateway}} file you downloaded in step 2:
 
+{% if_version lte:3.3.x %}
 {% capture dockerfile_run_steps %}COPY docker-entrypoint.sh /docker-entrypoint.sh
 
 USER kong
@@ -118,7 +119,6 @@ RUN set -ex; \
 {{ dockerfile_run_steps }}
 ```
 {% endnavtab %}
-
 {% navtab Alpine %}
 ```dockerfile
 
@@ -144,13 +144,105 @@ RUN set -ex; \
     && apk del .build-deps \
     && kong version
 
+{{ dockerfile_run_steps }}
+```
+{% endnavtab %}
+{% endnavtabs %}
+{% endcapture %}
+{{ dockerfile | indent }}
+{% endif_version %}
+
+{% if_version gte:3.4.x %}
+{% capture dockerfile_run_steps %}COPY docker-entrypoint.sh /docker-entrypoint.sh
+
+USER kong
+
+ENTRYPOINT ["/docker-entrypoint.sh"]
+
+EXPOSE 8000 8443 8001 8444 8002 8445 8003 8446 8004 8447
+
+STOPSIGNAL SIGQUIT
+
+HEALTHCHECK --interval=10s --timeout=10s --retries=10 CMD kong health
+
+CMD ["kong", "docker-start"]{% endcapture %}
+
+{% capture dockerfile %}
+{% navtabs codeblock indent %}
+
+{% navtab Debian %}
+```dockerfile
+
+FROM debian:bullseye-slim
+
+COPY kong.deb /tmp/kong.deb
+
+RUN set -ex; \
+    apt-get update \
+    && apt-get install --yes /tmp/kong.deb \
+    && rm -rf /var/lib/apt/lists/* \
+    && rm -rf /tmp/kong.deb \
+    && chown kong:0 /usr/local/bin/kong \
+    && chown -R kong:0 /usr/local/kong \
+    && ln -s /usr/local/openresty/bin/resty /usr/local/bin/resty \
+    && ln -s /usr/local/openresty/luajit/bin/luajit /usr/local/bin/luajit \
+    && ln -s /usr/local/openresty/luajit/bin/luajit /usr/local/bin/lua \
+    && ln -s /usr/local/openresty/nginx/sbin/nginx /usr/local/bin/nginx \
+    && kong version
+
 {{ dockerfile_run_steps }}
 ```
 {% endnavtab %}
 
+{% navtab Ubuntu %}
+```dockerfile
+
+FROM ubuntu:20.04
+
+COPY kong.deb /tmp/kong.deb
+
+RUN set -ex; \
+    apt-get update \
+    && apt-get install --yes /tmp/kong.deb \
+    && rm -rf /var/lib/apt/lists/* \
+    && rm -rf /tmp/kong.deb \
+    && chown kong:0 /usr/local/bin/kong \
+    && chown -R kong:0 /usr/local/kong \
+    && ln -s /usr/local/openresty/bin/resty /usr/local/bin/resty \
+    && ln -s /usr/local/openresty/luajit/bin/luajit /usr/local/bin/luajit \
+    && ln -s /usr/local/openresty/luajit/bin/luajit /usr/local/bin/lua \
+    && ln -s /usr/local/openresty/nginx/sbin/nginx /usr/local/bin/nginx \
+    && kong version
+
+{{ dockerfile_run_steps }}
+```
+{% endnavtab %}
+
+{% navtab RHEL %}
+```dockerfile
+
+FROM registry.access.redhat.com/ubi8/ubi:8.1
+
+COPY kong.rpm /tmp/kong.rpm
+
+RUN set -ex; \
+    yum install -y /tmp/kong.rpm \
+    && rm /tmp/kong.rpm \
+    && chown kong:0 /usr/local/bin/kong \
+    && chown -R kong:0 /usr/local/kong \
+    && ln -s /usr/local/openresty/bin/resty /usr/local/bin/resty \
+    && ln -s /usr/local/openresty/luajit/bin/luajit /usr/local/bin/luajit \
+    && ln -s /usr/local/openresty/luajit/bin/luajit /usr/local/bin/lua \
+    && ln -s /usr/local/openresty/nginx/sbin/nginx /usr/local/bin/nginx \
+    && kong version
+
+{{ dockerfile_run_steps }}
+```
+{% endnavtab %}
 {% endnavtabs %}
 {% endcapture %}
 {{ dockerfile | indent }}
+{% endif_version %}
 
 1. Build your image:
 ```bash