Made cert cleanup and generation more robust.

Makefile

@@ -38,7 +38,7 @@ show-cert:
 
 .PHONY: clean-certs
 clean-certs:
-	rm "certs/${DOMAIN}"*
+	rm -f "certs/${DOMAIN}"*
 
 
 .PHONY: certs
@@ -47,8 +47,10 @@ certs: \
 
 
 certs/${DOMAIN}.crt: certs/${DOMAIN}.key
+	mkdir -p certs
 	echo -en ".\n.\n.\n.\n.\n${DOMAIN}\n.\n" | \
 		openssl req -x509 -key "certs/${DOMAIN}.key" -out "$@" -days ${CERT_DAYS} -nodes
 
 certs/${DOMAIN}.key:
+	mkdir -p certs
 	openssl genrsa -out "$@" 4096

README.md

@@ -8,7 +8,7 @@
 
 ## Usage
 
-`make` - Starts an ncat server.
+`make` - Starts a ncat server.
 
 `make ncat-server` – Starts a ncat server.