fix: add .opam file

dune-project

@@ -3,6 +3,7 @@
 (using directory-targets 0.1)
 
 (name riot_website)
+(generate_opam_files true)
 
 (source (github riot-ml/website))
 

riot_website.opam

@@ -0,0 +1,32 @@
+# This file is generated by dune, edit dune-project instead
+opam-version: "2.0"
+maintainer: ["Leandro Ostera <[email protected]>"]
+authors: ["Leandro Ostera <[email protected]>"]
+license: "MIT"
+homepage: "https://github.com/riot-ml/website"
+doc: "https://github.com/your-username/website"
+bug-reports: "https://github.com/riot-ml/website/issues"
+depends: [
+  "dune" {>= "3.11" & >= "3.11"}
+  "melange" {>= "2.1.0"}
+  "ocaml" {>= "5.1.0"}
+  "opam-check-npm-deps"
+  "ppx_deriving"
+  "reason" {>= "3.10.0"}
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/riot-ml/website.git"