Add tests for nginx.conf directives (#1)

Adds tests to make sure all the `nginx.conf` directives (the redirects and rewrites and such) are all correct.

- Uses the `busted` framework
- The tests are run in a Docker container by the bash script `test.sh`
- Self-signed certs are generated in `Dockerfile` for all the domain names
- Adds new `Makefile` commands: `test`, `image-build` and `image-rm`

Reviewed-on: #1
Co-authored-by: Catalin Mititiuc <webdevcat@proton.me>
Co-committed-by: Catalin Mititiuc <webdevcat@proton.me>

README.md

@@ -15,15 +15,19 @@
 
 ### build docker image
 
-    $ docker build -t sitegen-openresty .
+    $ make image-build
+
+### rebuild an existing docker image
+
+    $ make image-rm image-build
 
 ### generate a new site file
 
-    $ docker run --rm -w /opt -v $PWD:/opt sitegen-openresty sitegen new
+    $ docker run --rm -w /opt/app -v $PWD:/opt/app miti.sh sitegen new
 
 ### add an index page
 
-    $ docker run --rm -w /opt -v $PWD:/opt sitegen-openresty sitegen page /opt/ index
+    $ docker run --rm -w /opt/app -v $PWD:/opt/app miti.sh sitegen page /opt/app index
 
 ### add to `site.moon`
 
@@ -50,17 +54,9 @@
 
 ### build site
 
-    $ docker run --rm -w /opt/app -v $PWD:/opt/app sitegen-openresty sitegen
-
-or
-
     $ make build
 
-### start server
-
-    $ docker run --rm -it --init -v $PWD:/opt/app -p 8080:8080 sitegen-openresty
-
-or
+### start dev server
 
     $ make
 
@@ -70,6 +66,10 @@ Visit `localhost:8080` in web browser
 
     $ docker exec -it container_name sitegen watch
 
+### run tests
+
+    $ make test
+
 ### lint moonscript
 
     $ make lint
@@ -100,8 +100,7 @@ to return `nil`, you will see this cryptic error:
 
 Delete your `.sitegen_cache` file.
 
-## todo
+## thinking about
 
 * draft documents
 * treesitter highlighting for moonscript
-* penlight library