chore: ffmpeg 설치 config파일 추가

Author: ChaJunWoo-dev

.ebextensions/ffmpeg.config

@@ -0,0 +1,20 @@
+packages:
+  yum:
+    wget: []
+    tar: []
+
+commands:
+  01-download-ffmpeg:
+    command: "wget -O /tmp/ffmpeg.tar.xz https://www.johnvansickle.com/ffmpeg/old-releases/ffmpeg-3.4.2-64bit-static.tar.xz"
+
+  02-create-dir:
+    command: "mkdir -p /opt/ffmpeg"
+
+  03-extract:
+    command: "tar -xvf /tmp/ffmpeg.tar.xz -C /opt/ffmpeg --strip-components=1"
+
+  04-link-ffmpeg:
+    command: "ln -sf /opt/ffmpeg/ffmpeg /usr/bin/ffmpeg"
+
+  05-link-ffprobe:
+    command: "ln -sf /opt/ffmpeg/ffprobe /usr/bin/ffprobe"