Add rockspec (#60)

* Add rockspec

* Adding .init extension to files which are not inside a package, for require function to work properly

dist/luarocks/apigateway-2.0.2-1.rockspec

@@ -0,0 +1,41 @@
+package = "apigateway"
+version = "2.0.2-1"
+
+local fsPrefix = "./api-gateway-config/scripts/lua/"
+local packagePrefix = "api-gateway."
+
+local function make_plat(plat)
+    return {
+        modules = {
+            ["api_gateway_init.init"] = fsPrefix .. "api_gateway_init.lua",
+            [packagePrefix .. "metrics.factory"] = fsPrefix .. "metrics/factory.lua",
+            [packagePrefix .. "metrics.MetricsBuffer"] = fsPrefix .. "metrics/MetricsBuffer.lua",
+            [packagePrefix .. "metrics.MetricsCollector"] = fsPrefix .. "metrics/MetricsCollector.lua"
+        }
+    }
+end
+
+source = {
+    url = "https://github.com/adobe-apiplatform/apigateway.git",
+    tag = "api-gateway-docker-2.0.2"
+}
+
+description = {
+    summary = "Base API Gateway installation",
+    license = "MIT"
+}
+
+dependencies = {
+    "lua > 5.1"
+}
+
+build = {
+    type = "builtin",
+    platforms = {
+        unix = make_plat("unix"),
+        macosx = make_plat("macosx"),
+        haiku = make_plat("haiku"),
+        win32 = make_plat("win32"),
+        mingw32 = make_plat("mingw32")
+    }
+}