Update readme, use more threads on build

Signed-off-by: didinst <9f6129a2ddff0d0c6d03169eaa75e3fea1c1770f>

Dockerfile

@@ -6,7 +6,7 @@ RUN apk update && apk --no-cache upgrade \
 	&& mkdir build \
 	&& cd build \
 	&&	cmake -DCMAKE_BUILD_TYPE=Release .. \
-	&& cmake --build . -j 4 --target install \
+	&& cmake --build . -j 8 --target install \
 	&& apk del linux-headers gcc gperf cmake build-base git \
 	&& cd ../.. \
 	&& rm -r ./telegram-bot-api

README.md

@@ -31,8 +31,6 @@ Get buidlx here https://github.com/docker/buildx
 Buildix documentation here https://docs.docker.com/buildx/working-with-buildx/
 
 Run image
-`docker run --privileged --rm docker/binfmt`
-Or (alternative)
 `docker run --privileged --rm  multiarch/qemu-user-static:latest`
 
 Create profile (linux/arm/v7 used as example)