Updated Installation (markdown)

Installation.md

@@ -15,5 +15,50 @@ sudo make install
 
 libcoraza.so will be installed at `/usr/local/lib`
 
-# Configuration
-1. 
+## 2. Coreruleset
+coreruleset is an opensource waf rules.
+1. clone the repository
+
+`git clone https://github.com/coreruleset/coreruleset`
+
+## 3. lua-resty-coraza
+```bash
+opm get potats0/lua-resty-coraza
+```
+# Synopsis
+
+```lua
+
+init_worker_by_lua_block{
+    coraza = require "resty.coraza"
+    waf = coraza.create_waf()
+    -- add rule from file
+    coraza.rules_add_file(waf, "%s/t/coraza.conf")
+
+    -- your corerule set, add rule from directive
+    coraza.rules_add(waf, "Include %s/t/coreruleset/crs-setup.conf.example")
+    coraza.rules_add(waf, "Include %s/t/coreruleset/rules/*.conf")
+}
+
+location /t {
+    access_by_lua_block {
+        coraza.do_create_transaction(waf)
+        coraza.do_access_filter()
+        coraza.do_interrupt()
+    }
+
+    content_by_lua_block {
+        ngx.say("passed")
+    }
+
+    header_filter_by_lua_block{
+        coraza.do_header_filter()
+        coraza.do_interrupt()
+    }
+
+    log_by_lua_block{
+        coraza.do_log()
+        coraza.do_free_transaction()
+    }
+}
+```