Convert the SSL hello world example to a release

examples/ssl_hello_world/src/ssl_hello_world.app.src

@@ -8,7 +8,8 @@
 	{applications, [
 		kernel,
 		stdlib,
-		cowboy
+		cowboy,
+		ssl
 	]},
 	{mod, {ssl_hello_world_app, []}},
 	{env, []}

examples/ssl_hello_world/src/ssl_hello_world.erl

@@ -1,15 +0,0 @@
-%% Feel free to use, reuse and abuse the code in this file.
-
--module(ssl_hello_world).
-
-%% API.
--export([start/0]).
-
-%% API.
-
-start() ->
-	ok = application:start(crypto),
-	ok = application:start(cowlib),
-	ok = application:start(ranch),
-	ok = application:start(cowboy),
-	ok = application:start(ssl_hello_world).

examples/ssl_hello_world/src/ssl_hello_world_app.erl

@@ -16,11 +16,12 @@ start(_Type, _Args) ->
 			{"/", toppage_handler, []}
 		]}
 	]),
+	PrivDir = code:priv_dir(ssl_hello_world),
 	{ok, _} = cowboy:start_https(https, 100, [
 		{port, 8443},
-		{cacertfile, "priv/ssl/cowboy-ca.crt"},
-		{certfile, "priv/ssl/server.crt"},
-		{keyfile, "priv/ssl/server.key"}
+		{cacertfile, PrivDir ++ "/ssl/cowboy-ca.crt"},
+		{certfile, PrivDir ++ "/ssl/server.crt"},
+		{keyfile, PrivDir ++ "/ssl/server.key"}
 	], [{env, [{dispatch, Dispatch}]}]),
 	ssl_hello_world_sup:start_link().
 

examples/ssl_hello_world/src/toppage_handler.erl

@@ -11,7 +11,9 @@ init(_Transport, Req, []) ->
 	{ok, Req, undefined}.
 
 handle(Req, State) ->
-	{ok, Req2} = cowboy_req:reply(200, [], <<"Hello world!">>, Req),
+	{ok, Req2} = cowboy_req:reply(200, [
+		{<<"content-type">>, <<"text/plain">>}
+	], <<"Hello world!">>, Req),
 	{ok, Req2, State}.
 
 terminate(_Reason, _Req, _State) ->