Update css to include source code pro for font family

frontend/tty-receiver/main.css

@@ -1,3 +1,38 @@
+@font-face {
+	font-family: Source Code Pro;
+	font-style: normal;
+	font-weight: 300;
+	src: local("Source Code Pro Light"), local("SourceCodePro-Light"), url(https://cdn.jsdelivr.net/npm/source-code-pro@2.30.2/TTF/SourceCodePro-Light.ttf) format("truetype")
+}
+
+@font-face {
+	font-family: Source Code Pro;
+	font-style: normal;
+	font-weight: 400;
+	src: local("Source Code Pro"), local("SourceCodePro-Regular"), url(https://cdn.jsdelivr.net/npm/source-code-pro@2.30.2/TTF/SourceCodePro-Regular.ttf) format("truetype")
+}
+
+@font-face {
+	font-family: Source Code Pro;
+	font-style: normal;
+	font-weight: 600;
+	src: local("Source Code Pro Semibold"), local("SourceCodePro-Semibold"), url(https://cdn.jsdelivr.net/npm/source-code-pro@2.30.2/TTF/SourceCodePro-Semibold.ttf) format("truetype")
+}
+
+@font-face {
+	font-family: Source Code Pro;
+	font-style: normal;
+	font-weight: 700;
+	src: local("Source Code Pro Bold"), local("SourceCodePro-Bold"), url(https://cdn.jsdelivr.net/npm/source-code-pro@2.30.2/TTF/SourceCodePro-Bold.ttf) format("truetype")
+}
+
+@font-face {
+	font-family: Source Code Pro;
+	font-style: italic;
+	font-weight: 400;
+	src: local("Source Code Pro Italic"), local("SourceCodePro-It"), url(https://cdn.jsdelivr.net/npm/source-code-pro@2.30.2/TTF/SourceCodePro-It.ttf) format("truetype")
+}
+
 html, body {
     width: 100%;
     height: 100%;
@@ -11,3 +46,7 @@ html, body {
     height: 100%;
 }
 
+
+xterm {
+  font-family: Source Code Pro;
+}