Put mango binary in / instead of /root/Mango/

Update Dockerfile to reduce the image size

Dockerfile

@@ -1,18 +1,16 @@
-FROM crystallang/crystal:0.32.0
+FROM crystallang/crystal:0.32.1-alpine AS builder
-
-RUN apt-get update && apt-get install -y curl
-
-RUN curl -sL https://deb.nodesource.com/setup_10.x | bash -
-RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
-RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
-
-RUN apt-get update && apt-get install -y nodejs yarn libsqlite3-dev
 
 WORKDIR /Mango
 
 COPY . .
 COPY package*.json .
+RUN apk add --no-cache yarn yaml sqlite-static \
+    && make static
 
-RUN make && make install
+FROM library/alpine
 
-CMD ["mango"]
+WORKDIR /
+
+COPY --from=builder /Mango/mango .
+
+CMD ["./mango"]

README.md

@@ -75,6 +75,25 @@ mangadex:
 - `scan_interval_minutes` can be any non-negative integer. Setting it to `0` disables the periodic scan
 - `log_level` can be `debug`, `info`, `warn`, `error`, `fatal` or `off`. Setting it to `off` disables the logging
 
+### Library Structure
+
+You can organize your `.cbz/.zip` files in nested folders in the library directory. Here's an example:
+
+```
+.
+├── Manga 1
+│   ├── Volume 1.cbz
+│   ├── Volume 2.cbz
+│   ├── Volume 3.cbz
+│   └── Volume 4.zip
+└── Manga 2
+    └── Vol. 1
+        └── Ch.1 - Ch.3
+            ├── 1.zip 
+            ├── 2.zip 
+            └── 3.zip
+```
+
 ### Initial Login
 
 On the first run, Mango would log the default username and a randomly generated password to STDOUT. You are advised to immediately change the password.