Fix .gitignore and commit dream-pure.opam

.gitignore

@@ -15,7 +15,8 @@ _esy/
 esy.lock
 
 # Release script
-dream-*
+dream-*.gz
+dream-*/
 
 # Bisect_ppx
 _coverage/

dream-pure.opam

@@ -0,0 +1,34 @@
+opam-version: "2.0"
+
+synopsis: "Internal: shared HTTP types for Dream (server) and Hyper (client)"
+
+license: "MIT"
+homepage: "https://github.com/aantron/dream"
+doc: "https://aantron.github.io/dream"
+bug-reports: "https://github.com/aantron/dream/issues"
+dev-repo: "git+https://github.com/aantron/dream.git"
+
+author: "Anton Bachin <antonbachin@yahoo.com>"
+maintainer: "Anton Bachin <antonbachin@yahoo.com>"
+
+depends: [
+  "base64" {>= "3.1.0"}  # Base64.encode_string.
+  "bigstringaf" {>= "0.5.0"}  # Bigstringaf.to_string.
+  "dune" {>= "2.7.0"}  # --instrument-with.
+  "hmap"
+  "lwt"
+  "multipart_form" {>= "0.3.0"}
+  "ocaml" {>= "4.08.0"}
+  "ptime" {>= "0.8.1"}  # Ptime.weekday.
+  "uri" {>= "4.2.0"}
+
+  # Testing, development.
+  "alcotest" {with-test}
+  "bisect_ppx" {with-test & >= "2.5.0"}  # --instrument-with.
+  "ppx_expect" {with-test}
+  "ppx_yojson_conv" {with-test}
+]
+
+build: [
+  ["dune" "build" "-p" name "-j" jobs]
+]