add build and usage

README.md

@@ -0,0 +1,19 @@
+# sendd-docker
+
+sendd-docker ships sendd in one easily runnable package.
+
+Building:
+
+    git clone https://github.com/Josh1147582/sendd-docker
+    cd sendd-docker
+    docker build -t sendd-docker .
+
+Running:
+
+    docker run -p 3000:3000 -p 9000:9000 \
+    --name=sendd \
+    -e "HOST=`curl ipv4.icanhazip.com`" \
+    -d \
+    sendd-docker
+
+Connect to the server (by default) at port 3000. Port 9000 must also be open for the peer server to communicate with clients.