Bypass lua checking when the request is not a POST

Fixed nit, added changeset for rpc-proxy

.changeset/smart-crabs-jump.md

+---
+'@eth-optimism/rpc-proxy': patch
+---
+
+Initial rpc-proxy package

ops/docker/rpc-proxy/nginx.template.conf

@@ -69,7 +69,9 @@ http {
     }
     location / {
       set $jsonrpc_whitelist {{env.Getenv "ETH_CALLS_ALLOWED"}};
-      access_by_lua_file 'eth-jsonrpc-access.lua';
+      if ($request_method = POST) {
+        access_by_lua_file 'eth-jsonrpc-access.lua';
+      }
       proxy_pass http://sequencer;
     }
   }

ops/docker/rpc-proxy/package.json

+{
+  "name": "@eth-optimism/rpc-proxy",
+  "version": "0.0.1",
+  "private": true,
+  "devDependencies": {}
+}

package.json

@@ -11,7 +11,8 @@
       "specs",
       "go/gas-oracle",
       "go/batch-submitter",
-      "go/proxyd"
+      "go/proxyd",
+      "ops/docker/rpc-proxy"
     ],
     "nohoist": [
       "examples/*"