add snap manifest

snapcraft.yaml

@@ -0,0 +1,27 @@
+name: opera-proxy
+version: '1.0.0'
+summary: Standalone Opera VPN proxies client.
+description: |
+  Standalone Opera VPN proxies client. Just run it and it'll start plain HTTP proxy server forwarding traffic via proxies of your choice.
+
+confinement: strict
+base: core18
+
+parts:
+  opera-proxy:
+    plugin: go
+    source: .
+    build-packages:
+      - gcc
+    override-build:
+      make &&
+      cp bin/opera-proxy "$SNAPCRAFT_PART_INSTALL"
+    stage:
+      - opera-proxy
+
+apps:
+  opera-proxy:
+    command: opera-proxy
+    plugs:
+      - network
+      - network-bind