restructure folders

https-tls/openssl/README.md

@@ -0,0 +1,34 @@
+# tls example
+
+## Usage
+
+### Certificate
+
+We put the self-signed certificate in this directory as an example
+but your browser would complain that it isn't secure.
+So we recommend to use [`mkcert`] to trust it. To use local CA, you should run:
+
+```bash
+mkcert -install
+```
+
+If you want to generate your own cert/private key file, then run:
+
+```bash
+mkcert 127.0.0.1
+```
+
+[`mkcert`]: https://github.com/FiloSottile/mkcert
+
+### server
+
+```bash
+cd security/openssl
+cargo run (or ``cargo watch -x run``)
+# Started http server: 127.0.0.1:8443
+```
+
+### web client
+
+- curl: ``curl -v https://127.0.0.1:8443/index.html --compressed -k``
+- browser: [https://127.0.0.1:8443/index.html](https://127.0.0.1:8443/index.html)