chore(deployment): use docker to deploy katbin

Signed-off-by: SphericalKat <amolele@gmail.com>

.dockerignore

@@ -0,0 +1,5 @@
+/target
+.idea
+.env
+.cargo
+*.dump

.gitignore

@@ -2,3 +2,4 @@
 .idea
 .env
 .cargo
+*.dump

Dockerfile

@@ -1,7 +1,7 @@
-FROM rustlang/rust:nightly as build
+FROM rustlang/rust:nightly
 
 COPY . .
 
 RUN cargo build --release
 
-CMD ["sh", "-c", "ROCKET_PORT=$PORT ROCKET_KEEP_ALIVE=0 ./target/release/katbin"]
+CMD ["sh", "-c", "ROCKET_KEEP_ALIVE=0 ./target/release/katbin"]