+ xdebug into workspace & opcache into php-fpm

+ docker image inspect instructions

src/README.md

@@ -0,0 +1,39 @@
+## For use DOCKER_BUILD_KIT
+
+Set bash env vars:
+
+```bash
+export DOCKER_BUILDKIT=1
+export COMPOSE_DOCKER_CLI_BUILD=1
+
+```
+
+## Recommended aliases
+
+```bash
+alias dc='docker-compose'
+alias dils='docker image ls | grep'
+alias dirm='docker image rm'
+```
+
+## Visualize docker images tree
+
+https://github.com/justone/dockviz
+
+### Setup
+
+Add into your `~/.bash_aliases`:
+
+`alias dockviz="docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock nate/dockviz"`
+
+For use visualization with `/usr/bin/dot`
+
+`apt install graphviz`
+
+### Containers
+
+`dockviz containers -d | dot -Tpng -o ~/containers.png`
+
+### Images
+
+`dockviz images -d | dot -Tpng -o ~/images.png`