# [Python 3.8 (pre-release)], 263 bytes

Darn, didn't get first…
<!-- language-all: lang-python -->

 def f(b):
 l=2*len(b)-sum(b);S=[[" "]*-~l for i in range(l+1)]
 for i in range(l):S[i][l+~i]=S[i+1][l-i]="\\"
 b="".join([str(i)for i in b]).replace("0","02")
 for i in range(l-1):S[l-2-i][i]=S[l-i][i+2]=" "if"0"<b[i]else"/"
 return"\n".join("".join(i)for i in S)

[Try it online!][TIO-lxtodz4m]

[Python 3.8 (pre-release)]: https://docs.python.org/3.8/
[TIO-lxtodz4m]: https://tio.run/##ZY4xbsMwDEV3n0LgJMZSKrlLkdan8ChriFupUcHKhuwMXXJ1l0naIEAW8n8S/I/Tz3IY8/PLVNb1I0QR5YC7SlDbbChkNno@fnN77VrnQIDf6BOJOBaRRMqi7PNnkFRb9NXDFHedS95RfUq@ZVlbNpo19D1UYmgBtl9jytLNS5EJb/eDx20JE@3fgwQDCkwD@Jiv7ZlAuuFMd0HQRdUNIwSkyLdvA28CzQGeGFnCciwZ@vwH/n/gjt3hOpWUFxmls8ooq67VKOMR118 "Python 3.8 (pre-release) – Try It Online"